9.5. SIMPLE WAY OF H.V. INVERTER/MAGNETRON TROUBLESHOOTING
Purpose:
Simple way
(3/23 seconds rule)
of identifying whether it’s Magnetron, Inverter or others.
Set-up:
The unit under question is connected through the Ammeter as shown below.
Procedure:
Follow the matrix table below to identify the problem source.
Note:
Do not replace both Inverter board and Magnetron simultaneously and automatically without going through this
procedure.
Power will:
Ammeter reading is:
To do:
Remedy:
Shut off in 23 seconds
after “Start”.
1. Between 0.5A and 1.0A.
Check and repair open magnetron circuit Open magnetron wiring between Inverter
and magnetron terminal.
2. Between 1.0A and 2.0A.
Check continuity of D702 in Inverter
PCB.
1. D702 shorted
Replace
H.V.Inverter
(F606Y9X90AP)
2. D702 is OK
Replace
magnetron
Shut off in 3 seconds
after “Start”
1. Less than 0.5A
Check open circuit: Interlock Switch,
DPC, Power Relay and CN701
Replace
defective
component(s),
or
correct switch, cables and connectors.
23
NN-GF574S / NN-GF574M
Summary of Contents for NN-GF574S
Page 2: ...2 NN GF574S NN GF574M ...
Page 3: ...3 NN GF574S NN GF574M ...
Page 5: ...1 FEATURE CHART 2 CONTROL PANEL 5 NN GF574S NN GF574M ...
Page 6: ...3 SCHEMATIC DIAGRAM 6 NN GF574S NN GF574M ...
Page 25: ...10 EXPLODED VIEW AND PARTS LIST 10 1 EXPLODED VIEW 25 NN GF574S NN GF574M ...
Page 31: ...11 DIGITAL PROGRAMMER CIRCUIT 11 1 SCHEMATIC DIAGRAM 31 NN GF574S NN GF574M ...
Page 32: ...32 NN GF574S NN GF574M ...
